Cam for bag-looms.



:Patented June 23, 1903.

PATENT OFFICE..V

HENRY BARDSLEY, OF PROVIDENCE, TON & KNOWLES LOOM WORKS,

RHODE ISLAND, ASSIGNOR TO CROMP- OF WORCESTER, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

CAM FOR BAG-LOOMS.

.SPECIFICATION forming part of Letters Patent No.

731,655, dated June 23, 1903.

Application filed March 26, 1903. Serial No. 149,695. (No model.)

To all whom t may concern: y Be it known that I, HENRY BARDsLEY, acitizen of the United States, residing at Provi- 4 dence, in thecountyof Providence and State of Rhode Island, have invented certain new anduseful Improvements in Cams for Bag- Locms, of `which the following is aspecification. My invention relates to a cam-switch mech- `lo anism`intended particularly to be used on looms for weaving bags toautomatically change the weave to weave the bottoni of the bag. Y

The object of my invention is to provide a x5 cam-switch mechanism ofsimple construction and automatic operation, and my invention consistsin certain novel features of construction of my cam-switch mechanism, aswill be hereinafter fully described.

I have only shown in the drawings a cam having my switch mechanismapplied thereto and mechanism for automatically operating' the switchmechanism, suflicient to Venable thoswe skilled in the art to understandthe construction and operation thereof.

Referring to the drawings, Figure, 1 is a View of one side of a camhaving my switch mechanism applied thereto. Fig. 2 is a sectional viewshowing the opposite side of the 3o cam shown in Fig. 1; and Fig. 3 is afront perspective View of the bearing for the driven shaft, on whichlthe cam shown in Figs. 1 and 2 is secured, and also of the bearing forthe `rocker-arm, carrying pins to operate `the 3 5 switch on the cam, aswill be hereinafter described.

g' In the accompanying drawings, 1 is a cam having my switch mechanismthereon, to-be hereinafter described.

4o outer cam-groove 1 in one side thereof and an inner cam groove 1"leading into the outer groove 1. The opening or passage into the innercam-groove 1l from the outer camgroove 1' is controlled by the switchpawl 2, to be hereinafter described. (See Fig. 2.)

The cam 1 is mounted on and secured to the drivingshaft 3, which isjournaled at one end, in this instance in a bearing 4; on a stand 5.Also in this instance on the stand 5o 5 is a bracket 6, having a bearing6 for one The cam 1 has an` vend of a shaft 7 secured in the bearing 6by a set-screw S. On the shaft 7 is loosely 1n cunted to rock therconthehub 9' of a rockarm 9 of angle shape at its outer end, with alaterally-projecting pin10 secured in one 55 angle arm and a secondlaterally-projecting pin 11 secured in the other angle arm. (See Fig.3.) To the rock-arm 9 is attached one end of a connector 12. The otherend of the connector 12 is attached to mechanism (not 6o shown) forcommunicating at the proper time a rocking motion to the arm 9, carryingthe operating-pins 10 and 1l. On the shaft 7 is fast the hub 13 of thearm 13, which is made yoked or forked at its outer end 13" to receive alip or projection 9'/ on the rock-arm 9. The projection 9" on therock-arm 9 extends between the forked end 13 of the arm 13 and limitsthe rocking moset-screw 14 through one of the forked arms on the arm 13provides means for regulating the amount of motion of the rock-arm 9.`

On a pin or stud 15 on the face of the cam 1 (see Fig. 1) is looselymounted a rock-plate 75 16, having on its opposite edges notches orshoulders 16' and 16, which are in the path of the pins 10 and l1 on therockarin 9 when said arm is rocked and the cam l is mounted on thedriven shaft 3.

A holding-pawl 17 is pivoted at o ne end on a screw 18 on the cam 1 and.has a beveled end adapted to be engaged by the pointed `end 16 on therock-plate 16 and to be moved on the rocking of said plate. After themovement of said plate the pawl extends on one side or the other of thepointed end of said plate to hold it in position. A flat spring 19,secured at one end by a screw 2O to the hub of the cam 1, bears at itsfree end pawl 17 below its pivot-point and acts to hold said pawlagainst the plate 16.

On the pin 15, on the opposite side of the cam 1 from the plate 16, isloosely mounted one end of the switch-pawl 2, (see Fig. 2,) 9 5 which isof suitable shape and is adapted to be moved to close the passage fromthe outer cam-groove 1 to the inner cam-groove 1', as shown by fulllines in Fig- 2, or to open the tion of the arm 9, and an adjustablebolt 012.70

against the 9o passage, as shown by broken lines, Fig. 2. Ioo

The switch-pawl 2 has fast in its upper end above its pivotal support apin 2, which eX- tends through an' elongated openin g 21 in the cam 1and into an open-end slot 16'/ in the upper end of the rock-plate 16.(See Fig. 1.)

On the cam 1 is a second pin 22, adapted to rock and having fast on oneend on one side of the cam 1 a switch-arm 23, (see Fig. 2,)

which divides the cam-groove 1 at one end struction of my improvementsmay be varied from the cam-groove 1. The other end ofthe pin 22 on theother side of the cam 1 has an arm 24, fast thereon, which is engagedbythe p free end of a spring 25, fast on a block 26 on the cam 1. Thespring 25 acts to normally keep the end of the arm 24 in engagement withthe projection 27 on the hub of the cam 1, (see Fig. 1,) and theswitch-arm 23 closed, as shown in Fig. 2.

The operation of my cam-switch mechanism will be readily understood bythose skilled in the art. The revolution of the driven shaft 3 in thedirection of arrow a, Fig. 3, will cause the cam 1 when fast on saidshaft to revolve in the same direction or the direction differentcam-grooves in its surface, and a ofA arrow b, Fig. 1. The revolution ofthe cam 1 with the switch-pawl 2 in its normal position (shown by fulllines, Fig. 2) will communicate through a roll (not shown) extendinginto the cam-groove 1 a movement to a part to be operated, said movementconforming to the shape of the cam-groove 1. When it is desired tochange the movement, the rockarm 9 is automatically moved down until thepin 10 thereon extends in the path of and engages the shoulder 16 on theplate 16 in the revolution of the cam 1. The engagement of the pin 10with the shoulder 16 rocks the plate 16 and disengages it from the pawl17 and through the pin 2' moves the switch-pawl 2 into the positionshown by broken lines in Fig. 2, opening the passage into the camgroove1l and causing the roll engaging the cam to travel in said groove 1l andopen the latch or arm 23 to change the movement of the part operated bythe cam 1. The rockplate 16, held by the pawl17, remains in thisposition until the rock-arm 9, carrying the pins 10 and 11, is againmoved at the proper time to bring the pin 11 thereon into the path ofthe rock-plate 16, and the engagement of said pin with'the shoulder 16Hon said plate rocks the plate and through the pin 2l moves theswitch-pawl 2 into the position shown by full lines in Fig. 2, closingthe passage into Ythe cam-groove 1ll andl causing the roll engaging thecam 1 to travel in the groove 1"to repeat the iirst movementcommunicated from the cam 1. The pawl17 engages the plate 16 and holdsit, and with it the switch-pawl 2, in its adjusted position, until againmoved by the tpin 10, as above described.

It will be understood that the details of conif desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters 1. The combination with a cam having two vdifferentcamgrooves in its surface, of a switch-pawl on the cam for opening andclosing the passage between said two cam-grooves, and means foroperating said switchpawl,

said means consisting of arock-plate on the camconnected with saidswitch-pawl, and a locking or holding p'awl for said'plate,substantially as shown and described.

2. The combination with'a camhaving two switch-pawl on the cam, foropening and closing the passage between said two cam-grooves, and arock-plate on the cam connected with "said switch-pawl, of means forrocking said "plate consisting of a rocking arm carrying two pins, andadapted to be moved to cause one pin to engage and move the'rock-platein one direction, and the other pin to engage and move the rock-plate inthe opposite direction, substantially as shown and described.

The combination with a cam having two different cam-grooves in itssurface, and a switch-pawl on the cam for opening and closing thepassage between said two cam-grooves,

vand a rock-plate on the cam connected with HENRY BARDSLEY.

)Vitnessesz J. C. DEWEY, M. HAAs.

IOO

